---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/38000#article
headline: "38000: Teams: Invalid To number"
url: https://www.twilio.com/docs/api/errors/38000
inLanguage: en
dateModified: 2026-08-04T20:07:40.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 38000: Teams: Invalid To number

Log Type: APPLICATION

Log Level: ERROR

## Description

The outbound call to a Teams number fails because the destination number is invalid. The destination Teams number must be provisioned in the account placing the call.

### Possible causes

* The destination Teams number might be provisioned in a different account.
* The number might not be in the ready state. The number might be in uploading or released.

### Possible solutions

* Verify the destination number is a Teams number provisioned in the account placing the call.
* Check the number's state in the connector configuration.